.box {
    display: -webkit-flex; /* Chrome, Safari */
    display: flex;
    background-color: white;
    /* flex-direction: row; */
    /* flex-direction: row-reverse; */
    /* flex-direction: column; */
    /* flex-direction: column-reverse; */
    /* justify-content: flex-start; */
    /* justify-content: flex-end; */
    /* justify-content: center; */
    /* justify-content: space-between; */
    justify-content: space-around;
}
.box-item {
    width: 200px;
    height: 200px;
    line-height: 200px;
    vertical-align: middle;
    margin: 5px;
    background-color: #ffd200;
    font-size: 100px;
    color: white;
    text-align: center;
}
